PUMP GP-GEAR 8J4515 - Caterpillar

Remove Water Pump
1. Drain the coolant from the cooling system. 2. Remove the bolts, and remove damper guard (1) from the engine. 3. Remove bolts (4), and remove elbow (3) and tube (2) as a unit from the engine. 4. Remove bolts (5) that hold the water pump to the drive adapter. 5. Fasten a hoist to water pump (7), and remove bolts (6) to remove the water pump from the engine. The weight of water pump (7) is 27 kg (60 lb.).Install Water Pump
1. Make sure gasket (3) is in position on the water line adapter. Install O-ring seal (2) on the pump housing, and put clean engine oil on it.2. Fasten a hoist to water pump (1), and put it in position in the pump drive. Make sure the splines on the pump shaft are correctly engaged with the pump drive splines. 3. Install bolts (4) and (5) that hold the water pump to the water line adapter and the pump drive adapter. 4. Install O-ring seal (8) on the pump housing, and put clean engine oil on it.5. If necessary, make a replacement of the O-ring seals on each end of tube (6), and put clean engine oil on the seals.6. Put tube (6) and elbow (7) as a unit in position, and install the bolts to hold these in position. 7. Install damper guard (9) on the engine.8. Fill the cooling system with coolant to the correct level. See the Maintenance Manual.Disassemble Water Pump
Start By:a. remove water pump 1. Remove elbow (1) from housing assembly (2). Remove the O-ring seal from elbow (1). 2. Remove O-ring seal (5) from the back of housing assembly (2).3. Remove washer (4) that holds shaft assembly (3) in housing assembly (2). 4. Remove cover (6) from housing assembly (2). Remove the O-ring from cover (6). Later model water pumps use a nut to hold the impeller on the shaft instead of bolt (8).5. Loosen bolt (8) and the washer that hold impeller (7) to the pump shaft. Use tooling (A) to loosen impeller (7) from the end of the pump shaft. Remove tooling (A), bolt (8), the washer and impeller (7) from the pump shaft and housing assembly (2). 6. Remove spring (10) from seal assembly (9) and shaft assembly (3).7. Use a soft faced hammer and push shaft assembly (3) out of seal assembly (9) and housing assembly (2). Remove seal assembly (9) from housing assembly (2). 8. Remove ceramic seal (11) from the rubber ring. Remove the rubber ring from housing assembly (2). 9. Remove seal (12) from the back of housing assembly (2).Assemble Water Pump
1. If necessary, make a replacement of the two filters in the pump housing at location (1).2. If necessary, make a replacement of plug (2) and the seal.3. Use tool group (A) to install the seal in the housing assembly. Make sure the lip of the seal is toward the outside as shown. Put clean engine oil on the lip of